Not very Athletic Bilbao. Bilboka Athletic Kluba, (as they say in the land of Basque), is a professional football club in the Basque Region of Spain. They are known as "Los Leones" (The Lions), because their stadium was built near a church called San Memes (Saint Mammes). Mammes was an early Christian thrown to the lions by the Romans. Mammes somehow pacified the lions and was later made a saint. The club is one of 3 founding members of the Primera Division who have never been rel